| 微弧氧化法制备WO_3/TiO_2复合薄膜的结构及光催化性能 |
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| 引用本文： | 何剑,蔡启舟,肖枫,罗强,王丽娟,祝迪.微弧氧化法制备WO_3/TiO_2复合薄膜的结构及光催化性能[J].催化学报,2009,30(11). |
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| 作者姓名： | 何剑 蔡启舟 肖枫 罗强 王丽娟 祝迪 |
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| 作者单位： | 1. 华中科技大学材料成形与模具技术国家重点实验室,湖北武汉,430074
2. 华中科技大学文华学院,湖北武汉,430074 |
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| 摘 要： | 采用微弧氧化工艺分别在钨酸盐和磷酸盐电解液中制备了WO_3/TiO_2复合薄膜和单一的TiO_2膜(P-TiO_2),利用X射线衍射、扫描电子显微镜、紫外-可见光谱和荧光光谱对这两种膜层的结构及光物理特性进行了表征.结果表明,P-TiO_2膜由锐钛矿与金红石混合相组成,而WO_3/TiO_2膜中除锐钛矿与金红石混合相外,还含有W0O相.两种膜层表面粗糙多孔,WO_3/TiO_2膜的孔洞数量更多,分布更均匀.WO_3/TiO_2膜的光吸收范围较P-TiO_2膜略宽,但后者在紫外光区的光吸收性能更好.WO_3O/TiO_2膜的荧光发光强度比P-TiO_2的小,光生电子-空穴之间的分离效果好.与P-TiO_2膜相比,WO_3/TiO_2膜的表面酸度高,吸附有机物和羟基的能力更强.紫外光下照射2 h,WO_3/TiO_2能够降解85%罗丹明,而P-TiO_2膜只能降解23%.WO_3/Ti0_2膜的高光催化活性源于它较高的比表面积、较优的电子.空穴分离效果和较高的表面酸度.
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| 关 键 词： | 钨 钛 微弧氧化 电解液 二氧化钛膜 光催化 |
Structure and Photocatalytic Properties of WO_3/TiO_2 Composite Film by Microarc Oxidation |
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| HE Jian,CAI Qizhou,XIAO Feng,LUO Qiang,WANG Lijuan,ZHU Di.Structure and Photocatalytic Properties of WO_3/TiO_2 Composite Film by Microarc Oxidation[J].Chinese Journal of Catalysis,2009,30(11). |
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| Authors: | HE Jian CAI Qizhou XIAO Feng LUO Qiang WANG Lijuan ZHU Di |
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| Institution: | HE Jian1,CAI Qizhou1,XIAO Feng2,LUO Qiang1,WANG Lijuan1,ZHU Di1 1State Key Laboratory of Material Processing , Die & Mould Technology,Huazhong University of Science , Technology,Wuhan 430074,Hubei,China 2Wenhua College,China |
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| Abstract: | A WO3/TiO2 composite film and a pure TiO2 film were prepared by microarc oxidation in tungsten electrolyte and phosphate electrolyte, respectively. The structure and photophysical properties of the two films were characterized by X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, and photoluminescence. The results showed that the two films consisted of a mixture of anatase and rutile, but the ratio of anatase to rutile was different. In addition, WO3 was present in the WO3/TiO2 composite ... |
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| Keywords: | tungsten titanium microarc oxidation electrolyte titania film photocatalysis |
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